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- Update two pde's if the kernel stack crosses a 4MB boundary.

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svn path=/trunk/; revision=4821
This commit is contained in:
Hartmut Birr 2003-06-01 19:50:04 +00:00
parent d4ce775b60
commit 210252c422
3 changed files with 15 additions and 14 deletions
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2
reactos/ntoskrnl/include/internal/mm.h
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@ -235,7 +235,7 @@ MmDeleteVirtualMapping(struct _EPROCESS* Process,
BOOL FreePage,
BOOL* WasDirty,
PHYSICAL_ADDRESS* PhysicalPage);
VOID MmUpdatePageDir(PULONG LocalPageDir, PVOID Address);
VOID MmUpdateStackPageDir(PULONG LocalPageDir, struct _KTHREAD* KThread);
#define MM_PAGE_CLEAN (0)
#define MM_PAGE_DIRTY (1)

8
reactos/ntoskrnl/ke/process.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: process.c,v 1.13 2003/05/08 05:26:36 gvg Exp $
/* $Id: process.c,v 1.14 2003/06/01 19:50:04 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/ke/process.c
@ -44,7 +44,6 @@ KeAttachProcess (PEPROCESS Process)
{
KIRQL oldlvl;
PETHREAD CurrentThread;
PVOID ESP;
PULONG AttachedProcessPageDir;
ULONG PageDir;
@ -69,11 +68,8 @@ KeAttachProcess (PEPROCESS Process)
To prevent this, make sure the page directory of the process we're
attaching to is up-to-date. */
__asm__("mov %%esp,%0\n\t"
: "=r" (ESP));
AttachedProcessPageDir = ExAllocatePageWithPhysPage(Process->Pcb.DirectoryTableBase);
MmUpdatePageDir(AttachedProcessPageDir, ESP);
MmUpdateStackPageDir(AttachedProcessPageDir, &CurrentThread->Tcb);
ExUnmapPage(AttachedProcessPageDir);
CurrentThread->OldProcess = PsGetCurrentProcess();

19
reactos/ntoskrnl/mm/i386/page.c
View file

@ -16,7 +16,7 @@
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: page.c,v 1.50 2003/05/17 13:45:04 hbirr Exp $
/* $Id: page.c,v 1.51 2003/06/01 19:50:04 hbirr Exp $
*
* PROJECT: ReactOS kernel
* FILE: ntoskrnl/mm/i386/page.c
@ -115,10 +115,10 @@ ProtectToPTE(ULONG flProtect)
#define ADDR_TO_PAGE_TABLE(v) (((ULONG)(v)) / (4 * 1024 * 1024))
#define ADDR_TO_PDE(v) (PULONG)(PAGEDIRECTORY_MAP + \
(((ULONG)v / (1024 * 1024))&(~0x3)))
((((ULONG)(v)) / (1024 * 1024))&(~0x3)))
#define ADDR_TO_PTE(v) (PULONG)(PAGETABLE_MAP + ((((ULONG)v / 1024))&(~0x3)))
#define ADDR_TO_PDE_OFFSET(v) (((ULONG)v / (4 * 1024 * 1024)))
#define ADDR_TO_PDE_OFFSET(v) ((((ULONG)(v)) / (4 * 1024 * 1024)))
NTSTATUS Mmi386ReleaseMmInfo(PEPROCESS Process)
{
@ -1247,13 +1247,18 @@ MmGetPhysicalAddress(PVOID vaddr)
VOID
MmUpdatePageDir(PULONG LocalPageDir, PVOID Address)
MmUpdateStackPageDir(PULONG LocalPageDir, PKTHREAD PThread)
{
unsigned Entry = ADDR_TO_PDE_OFFSET(Address);
unsigned EntryBase = ADDR_TO_PDE_OFFSET(PThread->StackLimit);
unsigned EntryTop = ADDR_TO_PDE_OFFSET(PThread->InitialStack - PAGE_SIZE);
if (0 == LocalPageDir[Entry])
if (0 == LocalPageDir[EntryBase])
{
LocalPageDir[Entry] = MmGlobalKernelPageDirectory[Entry];
LocalPageDir[EntryBase] = MmGlobalKernelPageDirectory[EntryBase];
}
if (EntryBase != EntryTop && 0 == LocalPageDir[EntryTop])
{
LocalPageDir[EntryTop] = MmGlobalKernelPageDirectory[EntryTop];
}
}